After a week of dealing with Brann standing on top of whatever I am trying to interact with on every character I have bothered to do the weekly delve quest. And then there are his “helpful things” that keep you in combat, interrupt your actions, and aggro mobs you aren’t ready to deal with quite yet. Then there are the constant mob evades, resets to full health, and immunes.
All that taken as a lump, I have this to say, not even the allure of a champion quality piece of gear will ever lure me back into doing another delve.